Description

Lightroom Classic is affected by an out-of-bounds write vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.8",
  "pubDate": "2026-08-11T18:17:29.880Z",
  "pubdate": "2026-08-11T18:17:29.880Z",
  "executiveSummary": "Adobe Lightroom Classic is impacted by a memory corruption flaw specifically classified as an out-of-bounds write vulnerability. This security deficiency poses significant risk to system integrity and user confidentiality, as successful exploitation enables an unauthorized threat actor to achieve arbitrary code execution within the security context of the currently logged-in user. The underlying flaw stems from improper handling of crafted inputs during file parsing operations within the application.\nThe risk implications are severe; if an adversary successfully triggers the vulnerability, they can execute arbitrary binary instructions, potentially leading to complete compromise of the local user session, installation of persistent malware, or unauthorized access to sensitive user data managed by Lightroom Classic. However, the attack vector is not entirely autonomous and features specific exploitation requirements. Specifically, successful exploitation mandates targeted user interaction, requiring the victim to explicitly open a malicious file supplied by the attacker. There are no requirements for pre-existing authentication or elevated privileges beyond the local user context, but the dependency on social engineering or victim participation remains a critical gating factor for a successful attack chain.",
  "technicalDetails": "The vulnerability resides in Adobe Lightroom Classic's internal file parsing and handling components, specifically manifesting as an out-of-bounds write condition. The root cause of this defect is inadequate boundary checking and insufficient validation of length or size parameters when processing specific file formats. When the application parses malicious file structures, arithmetic calculations or memory indexing operations fail to bound the destination buffer properly, leading to memory corruption through out-of-bounds write operations.\nThe attack flow proceeds as follows: First, an attacker crafts a malicious file designed to exploit the missing boundary validations within the file parsing routines of Lightroom Classic. Second, the adversary delivers this payload to the target user via common vectors such as spear-phishing email attachments, malicious downloads, or compromised storage media. Third, the victim interacts with the system by opening the malicious file using Lightroom Classic. Fourth, upon attempting to parse the malformed data structures, the vulnerable component triggers the out-of-bounds write, corrupting adjacent heap or stack memory spaces.\nBy meticulously engineering the payload contents, an attacker can overwrite critical application data structures or function pointers in memory. When the application subsequently executes manipulated execution paths or relies on corrupted pointers, control flow hijacking occurs. This enables the adversary to redirect execution to malicious shellcode contained within the payload. Because the software runs with standard user privileges, the resulting arbitrary code execution operates within the context of the current user, granting the attacker the ability to execute commands, access files, or deploy further tooling native to the user's privilege level. The vulnerability requires no network exposure for initial execution, relying entirely on local file processing, and requires no prior authentication or administrative privileges to manifest."
}